Fixes needed to build htop (#3691)

* Fixes needed to build htop

* Build libncursesw.so, not libncurses.so

* Remove htop hack now that it is picking up newer ncurses

* Tell packages to link to new ncursesw libraries

var/spack/repos/builtin/packages/lua/package.py

@@ -67,14 +67,14 @@ def install(self, spec, prefix):
              'MYLDFLAGS=-L%s -L%s' % (
                  spec['readline'].prefix.lib,
                  spec['ncurses'].prefix.lib),
-             'MYLIBS=-lncurses',
+             'MYLIBS=-lncursesw',
              'CC=%s -std=gnu99' % spack_cc,
              target)
         make('INSTALL_TOP=%s' % prefix,
              'MYLDFLAGS=-L%s -L%s' % (
                  spec['readline'].prefix.lib,
                  spec['ncurses'].prefix.lib),
-             'MYLIBS=-lncurses',
+             'MYLIBS=-lncursesw',
              'CC=%s -std=gnu99' % spack_cc,
              'install')